You will see the missile at approximately mid screen, traveling up and to the left. You will see clouds appear in the frame in the background. At :40, there is something that cuts a swath into the clouds, from right to left, around the mid left of the screen. It is similar to what a plane would do when traveling through a cloud at a good clip. This SLICES the cloud though, and it is almost instantaneous. Unrelated to the travel of the missile.

See what you think....very interesting. Unless I'm just seeing things!